Method of producing dental plates



Patented Sept, 1924.

MENDEL PIANKO, OF CHICAGO, ILLINOIS.

METHOD OF PRODUCING DENTAL- PLATES.

No Drawing.

To all whom it may ooncem:

Be it known that I, MENDEL P1ANKo,,-a citizen of the United States, residing at Chicago, in the county of Cook and State of 5 Illinois, have invented a new and useful Method of Producing Dental Plates, of which the following is a specification.

This invention relates to a method of pre paring dental plates whereby a very accurate,

thin and light all metal plate can be produced directly from the plaster impression without going through the intermediate steps now necessary-before the usual type of rubber or other form of plate can be pro- -duced. It is a Well known fact that owing to the necessary expansion and shrinkage from the heating and cooling of the plate during the formation thereof the plate will ofttimes become distorted so that it will not fit the mouth as accurately as desired or conform strictly with the configuration of theplastic cast or impression. It is an object of the present invention to provide a method of producing plates which will preserve the the exact contour of the. plastic impression, which obviates the necessity of distorting the plate through the action of heat, and

which overcomes the discomforts and inconveniences due to the use of thick and heavy plates. 1

-With the foregoing and other objects in view the invention consists in certain novel steps in the method hereinafter more fully described and pointed out in the claim, it

being understood that various changes may be made in the method without departing from the spirit of the invention as claimed.

When it is desired to prepare a plate a negative im ression of the mouth is taken 40 as ordinari y. This impression is coated with a shellac solution on which is formed Application filed October 6, 1921. Serial No. 505,957.

through the solution from the positive to v the negative pole with the result that the metal will be deposited on the graphite coating of the impression and an accurate plate will be produced conforming in every detail to the configuration of the month. After the plate has thus been produced the teeth can be assembled with the plate by means of vulcanite or rubber and the rubber vul-- canized onto the metal. a

What is claimed,is:-

The herein described method of producing a dental plate which consists in takingan impression of the mouth, coating'the impression, while wet, with a shellac solution, making a positive from the shellacked surface of the impression, applying a coating of graphite or other suitable metal .to'the second impression, suspendin the second im pression While wet from t, e negative pole of an electroplating apparatus, and setting up.an electrical currentthrough the apparatusr to plate the impression with a desired metal. 4

In testimony that I claim the foregoing as'my own, I have hereto aflixed my signature in the presence of awitness.

MENDEL PIANKO. Witness IVY E. SIMPsoN. 

